Base | Representation |
---|---|
bin | 11111000010111000000111 |
3 | 120022110120120 |
4 | 133002320013 |
5 | 4040410442 |
6 | 450233023 |
7 | 126113445 |
oct | 37027007 |
9 | 16273516 |
10 | 8138247 |
11 | 4659427 |
12 | 2885773 |
13 | 18bc340 |
14 | 111bb95 |
15 | aab4ec |
hex | 7c2e07 |
8138247 has 8 divisors (see below), whose sum is σ = 11685744. Its totient is φ = 5008128.
The previous prime is 8138243. The next prime is 8138279. The reversal of 8138247 is 7428318.
8138247 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 8138247 - 22 = 8138243 is a prime.
It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is an Ulam number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (8138243) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104298 + ... + 104375.
It is an arithmetic number, because the mean of its divisors is an integer number (1460718).
Almost surely, 28138247 is an apocalyptic number.
8138247 is a deficient number, since it is larger than the sum of its proper divisors (3547497).
8138247 is a wasteful number, since it uses less digits than its factorization.
8138247 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 208689.
The product of its digits is 10752, while the sum is 33.
The square root of 8138247 is about 2852.7612939046. The cubic root of 8138247 is about 201.1454851272.
It can be divided in two parts, 8138 and 247, that added together give a triangular number (8385 = T129).
The spelling of 8138247 in words is "eight million, one hundred thirty-eight thousand, two hundred forty-seven".
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